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Re: Test if a linux command is available with Spawn [message #86211 is a reply to message #86173]

Thu, 17 October 2013 11:30

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

On 10/16/13 8:12 AM, Phillip Bitzer wrote:
> How about spawning "which", which should fairly standard on *nix:
>
> spawn, 'which xclip', result
>

I would check the EXIT_STATUS on "which xclip":

IDL> spawn, 'which xclip', stdout, stderr, exit_status=xclip_error
IDL> help, xclip_error
XCLIP_ERROR LONG = 1

Error code not 1 means there was a problem, in this case I don't have
xclip. If I have the program, it's like this:

IDL> spawn, 'which ls', stdout, stderr, exit_status=ls_error
IDL> help, ls_error
LS_ERROR LONG = 0

In this case, I don't need stdout/stderr output, but calling SPAWN with
them suppresses output to the output log.

Mike
--
Michael Galloy
www.michaelgalloy.com
Modern IDL: A Guide to IDL Programming (http://modernidl.idldev.com)
Research Mathematician
Tech-X Corporation

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[Message index]

		Test if a linux command is available with Spawn By: Fabzi on Wed, 16 October 2013 05:08
		Re: Test if a linux command is available with Spawn By: Phillip Bitzer on Wed, 16 October 2013 07:12
		Re: Test if a linux command is available with Spawn By: Michael Galloy on Thu, 17 October 2013 11:30
		Re: Test if a linux command is available with Spawn By: Carsten Lechte on Thu, 17 October 2013 05:56
		Re: Test if a linux command is available with Spawn By: Carsten Lechte on Thu, 17 October 2013 06:00
		Re: Test if a linux command is available with Spawn By: chris_torrence@NOSPAM on Thu, 17 October 2013 09:25
		Re: Test if a linux command is available with Spawn By: Fabzi on Fri, 18 October 2013 02:00

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